THE PRESENT INVENTION PROVIDES A DISPOSABLE DIAPER IMPROVED SO AS TO PREVENT BODY WASTE FROM LEAKING SIDEWAYS WITHOUT SACRIFICING A BODILY FLUID ABSORBING CAPACITY OF A LIQUID-ABSORBENT STRUCTURE AND TO ASSURE APPROPRIATE FITNESS TO THE WEARER’S BODY. IN EACH OF FRONT AND REAR WAIST REGIONS (13, 14), A DISPOSABLE DIAPER (10) COMPRISES AN UPPER ELASTICIZED REGION (18) EXTENDING IN A VICINITY OF A WAIST-OPENING PERIPHERY (16A), LOWER ELASTICIZED REGIONS (20A, 20B), INTERMEDIATE ELASTICIZED REGION (19) EXTENDING BETWEEN THE UPPER ELASTICIZED REGION AND THE LOWER ELASTICIZED REGIONS AND OUTSIDE LONGITUDINALLY OPPOSITE ENDS (12A, 12B) OF A LIQUID-ABSORBENT STRUCTURE (12), AND, AT LEAST IN THE FRONT WAIST REGION OF THE FRONT AND REAR WAIST REGIONS, A NON-ELASTICIZED REGION (30) OPPOSED TO A CENTRAL ZONE OF A LIQUID-ABSORBENT CORE (44D) WHEREIN A TENSILE STRESS OF THE INTERMEDIATE ELASTICIZED REGION IS LOWER THAN A TENSILE STRESS OF THE UPPER ELASTICIZED REGION. FIGURE 1
